Shelf



FIG. 1 is a left, top, front perspective view of a shelf according to our new design;

FIG. 2 is a front elevational view thereof, the rear elevational view thereof being a mirror image of the front view shown;

FIG. 3 is a left side elevational view thereof, the right side elevational view thereof being a mirror image of the left side shown;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left, top, front perspective view of a shelf shown in environment;

FIG. 7 is a front elevational view thereof, the rear elevational view thereof being a mirror image of the front view shown; and,

FIG. 8 is a left side elevational view thereof, the right side elevational view thereof being a mirror image of the left side shown.

The broken line representations in the figures are for the purpose of illustrating unclaimed environment. The broken lines are thus not part of the claim. 

The ornamental design for a shelf, as shown and described. 